Adjustable height caster



FIG. 1 is a left side view of an adjustable height caster.

FIG. 2 is a front view of the design shown in FIG. 1.

FIG. 3 is a right side view of the design shown in FIG. 1; and,

FIG. 4 is a rear view of the design shown in FIG. 1.

The broken line showing of elements of a caster are for illustrative purposes only and form no part of the claimed design.

The undisclosed top and bottom views are not part of the claimed design. 

We claim the ornamental design for an adjustable height caster, as shown and described. 